It is called Waxing!
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The Moon is always the same size. What we see increasing is the lighted part of the nearside of the Moon. When it is increasing, we call it "waxing"; when we see it decreasing, the word "waning" is used.
Waxing. This term is used to describe the phase of the moon when it appears to be growing larger in the sky as it transitions from a new moon to a full moon.
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The term for the moon growing (or appearing to in phases) is waxing.
It's usually said that the moon is 'waxing' when it appears to grow in size.
The "more than 50%" moon is called the gibbous moon. When it is "growing" (appearing to get larger), it is a Waxing Gibbous; when "shrinking," it's the Waning Gibbous.
When the moon appears to be getting larger each day, it is said to be waxing. This phase occurs as the amount of illuminated surface visible from Earth increases, creating the appearance of a growing moon.
It becomes slowly smaller until it disappears and then starts growing larger (waxing) again.
Waxing means growing larger; waning means getting smaller.
Waxing refers to the moon appearing to grow larger in the sky as it moves from new moon to full moon. During this phase, the illuminated portion of the moon is increasing, resembling the process of wax melting and growing larger.
A waxing crescent is the phase of the Moon when it is growing larger but still less than half illuminated. It appears as a crescent shape in the sky. This phase happens after the new moon and before the first quarter moon.